Ecobee

2 field manuals · 9 error codes · 3 guides

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Thermostat

Ecobee thermostats

Manual · Thermostat

ecobee Smart Thermostat Premium / Enhanced and the Power Extender Kit: quick sheet

ecobee Smart Thermostat Premium and Enhanced (current lineup), plus older ecobee3 lite / ecobee4 that use the same Power Extender Kit (PEK). 24 V AC systems only.

3 components2 common failuresecobee
Manual · Thermostat

Smart thermostat installation & troubleshooting: field service manual

Wi-Fi thermostats for 24 VAC systems: Nest Learning/Nest Thermostat, ecobee, Honeywell Home T-series/Lyric, Sensi, Amazon Smart Thermostat. Line-voltage models (e.g. for baseboard heat) are covered only by the safety notes.

3 components5 common failuresGoogle Nest, ecobee, Honeywell Home / Resideo, Emerson Sensi, Amazon

Error codes

Alert 1000 Low (cold) temperature alertAlert 1001 High (hot) temperature alertAlert 1002 Sensor shut down the compressorAlert 1003 Furnace or boiler heating problemAlert 1004 / 1005 Heat pump heating problemAlert 1006 Cooling problemAlert 1009 Auxiliary heat running too longAlert 1010 Aux heat used at a high outdoor …Alert 1028 Remote sensor not communicating
Guide · Thermostat

Smart thermostat offline / Wi-Fi problems

Separate network problems (router, credentials, internet) from power problems: many smart thermostats switch the radio off when batteries or borrowed power run low. Read the brand's code first.

5 steps ~30 mineasy
Guide · Thermostat

Installing a C-wire adapter (Nest Power Connector, ecobee PEK and similar)

An adapter mounts at the furnace/air-handler board and lets the existing wires carry both the calls and constant 24 V. Check compatibility first: dual-transformer, fan-coil and communicating systems are commonly excluded.

5 steps ~45 minmoderate

Official Ecobee manuals & support

Brand names identify appliances only. OnCall Tech is not affiliated with or endorsed by Ecobee.